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tracing: Add hist_field_name() accessor 

In preparation for hist_fields that won't be strictly based on
trace_event_fields, add a new hist_field_name() accessor to allow that
flexibility and update associated users.

Link: http://lkml.kernel.org/r/5b5a2d36dde067cbbe2434b10f06daac27b7dbd5.1506105045.git.tom.zanussi@linux.intel.com

Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Tom Zanussi 2017-09-22 14:58:22 -05:00 committed by Steven Rostedt (VMware)
parent 0d7a8325bf
commit 85013256cf
1 changed files with 45 additions and 22 deletions
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67
kernel/trace/trace_events_hist.c
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@ -146,6 +146,23 @@ struct hist_trigger_data {
struct tracing_map *map;
};
static const char *hist_field_name(struct hist_field *field,
unsigned int level)
{
const char *field_name = "";
if (level > 1)
return field_name;
if (field->field)
field_name = field->field->name;
if (field_name == NULL)
field_name = "";
return field_name;
}
static hist_field_fn_t select_value_fn(int field_size, int field_is_signed)
{
hist_field_fn_t fn = NULL;
@ -653,7 +670,6 @@ static int is_descending(const char *str)
static int create_sort_keys(struct hist_trigger_data *hist_data)
{
char *fields_str = hist_data->attrs->sort_key_str;
struct ftrace_event_field *field = NULL;
struct tracing_map_sort_key *sort_key;
int descending, ret = 0;
unsigned int i, j;
@ -670,7 +686,9 @@ static int create_sort_keys(struct hist_trigger_data *hist_data)
}
for (i = 0; i < TRACING_MAP_SORT_KEYS_MAX; i++) {
struct hist_field *hist_field;
char *field_str, *field_name;
const char *test_name;
sort_key = &hist_data->sort_keys[i];
@ -703,8 +721,10 @@ static int create_sort_keys(struct hist_trigger_data *hist_data)
}
for (j = 1; j < hist_data->n_fields; j++) {
field = hist_data->fields[j]->field;
if (field && (strcmp(field_name, field->name) == 0)) {
hist_field = hist_data->fields[j];
test_name = hist_field_name(hist_field, 0);
if (strcmp(field_name, test_name) == 0) {
sort_key->field_idx = j;
descending = is_descending(field_str);
if (descending < 0) {
@ -952,6 +972,7 @@ hist_trigger_entry_print(struct seq_file *m,
struct hist_field *key_field;
char str[KSYM_SYMBOL_LEN];
bool multiline = false;
const char *field_name;
unsigned int i;
u64 uval;
@ -963,26 +984,27 @@ hist_trigger_entry_print(struct seq_file *m,
if (i > hist_data->n_vals)
seq_puts(m, ", ");
field_name = hist_field_name(key_field, 0);
if (key_field->flags & HIST_FIELD_FL_HEX) {
uval = *(u64 *)(key + key_field->offset);
seq_printf(m, "%s: %llx",
key_field->field->name, uval);
seq_printf(m, "%s: %llx", field_name, uval);
} else if (key_field->flags & HIST_FIELD_FL_SYM) {
uval = *(u64 *)(key + key_field->offset);
sprint_symbol_no_offset(str, uval);
seq_printf(m, "%s: [%llx] %-45s",
key_field->field->name, uval, str);
seq_printf(m, "%s: [%llx] %-45s", field_name,
uval, str);
} else if (key_field->flags & HIST_FIELD_FL_SYM_OFFSET) {
uval = *(u64 *)(key + key_field->offset);
sprint_symbol(str, uval);
seq_printf(m, "%s: [%llx] %-55s",
key_field->field->name, uval, str);
seq_printf(m, "%s: [%llx] %-55s", field_name,
uval, str);
} else if (key_field->flags & HIST_FIELD_FL_EXECNAME) {
char *comm = elt->private_data;
uval = *(u64 *)(key + key_field->offset);
seq_printf(m, "%s: %-16s[%10llu]",
key_field->field->name, comm, uval);
seq_printf(m, "%s: %-16s[%10llu]", field_name,
comm, uval);
} else if (key_field->flags & HIST_FIELD_FL_SYSCALL) {
const char *syscall_name;
@ -991,8 +1013,8 @@ hist_trigger_entry_print(struct seq_file *m,
if (!syscall_name)
syscall_name = "unknown_syscall";
seq_printf(m, "%s: %-30s[%3llu]",
key_field->field->name, syscall_name, uval);
seq_printf(m, "%s: %-30s[%3llu]", field_name,
syscall_name, uval);
} else if (key_field->flags & HIST_FIELD_FL_STACKTRACE) {
seq_puts(m, "stacktrace:\n");
hist_trigger_stacktrace_print(m,
@ -1000,15 +1022,14 @@ hist_trigger_entry_print(struct seq_file *m,
HIST_STACKTRACE_DEPTH);
multiline = true;
} else if (key_field->flags & HIST_FIELD_FL_LOG2) {
seq_printf(m, "%s: ~ 2^%-2llu", key_field->field->name,
seq_printf(m, "%s: ~ 2^%-2llu", field_name,
*(u64 *)(key + key_field->offset));
} else if (key_field->flags & HIST_FIELD_FL_STRING) {
seq_printf(m, "%s: %-50s", key_field->field->name,
seq_printf(m, "%s: %-50s", field_name,
(char *)(key + key_field->offset));
} else {
uval = *(u64 *)(key + key_field->offset);
seq_printf(m, "%s: %10llu", key_field->field->name,
uval);
seq_printf(m, "%s: %10llu", field_name, uval);
}
}
@ -1021,13 +1042,13 @@ hist_trigger_entry_print(struct seq_file *m,
tracing_map_read_sum(elt, HITCOUNT_IDX));
for (i = 1; i < hist_data->n_vals; i++) {
field_name = hist_field_name(hist_data->fields[i], 0);
if (hist_data->fields[i]->flags & HIST_FIELD_FL_HEX) {
seq_printf(m, " %s: %10llx",
hist_data->fields[i]->field->name,
seq_printf(m, " %s: %10llx", field_name,
tracing_map_read_sum(elt, i));
} else {
seq_printf(m, " %s: %10llu",
hist_data->fields[i]->field->name,
seq_printf(m, " %s: %10llu", field_name,
tracing_map_read_sum(elt, i));
}
}
@ -1140,7 +1161,9 @@ static const char *get_hist_field_flags(struct hist_field *hist_field)
static void hist_field_print(struct seq_file *m, struct hist_field *hist_field)
{
seq_printf(m, "%s", hist_field->field->name);
const char *field_name = hist_field_name(hist_field, 0);
seq_printf(m, "%s", field_name);
if (hist_field->flags) {
const char *flags_str = get_hist_field_flags(hist_field);